Moslem Brotherhood folks are Sunni activists, his folks, doing what Moslems do when there is a little extra wealth in the Moslem world. They are in no way ‘extreme’ when measured against the demands of their religion.
MB are Salafists, just like Al Qaeda. They both believe in the same sort of Islamic conquest via violent jihad but the MB thinks the time is later while Al Qaeda thinks it is now.
Since the MB has been booted to Gaza, from Qatar and Egypt, some members may decide to move a bit to the other side of the spectrum. With luck they’ll switch to jihad on their shia Hezbollah cohorts due to Syria/Lebanon.
Pass the popcorn please. The Nobel Peace Prize winner has them fighting from Tunisia clear across to Iraq now.